let browser = prompt("Input your browser:");
switch(browser) {
    case 'Edge':
        alert("You\' ve got the Edge!");
        break;
    case 'Chrome':
    case 'Firefox':
    case 'Safari':
    case 'Opera':
        alert("Okay we support these browers too");
        break;
    default:
        alert("We hope that this page looks ok!");
}


if (browser == 'Edge') {
    alert("You\' ve got the Edge!");
} else if (browser == 'Chrome' || browser == 'Firefox' || browser == 'Safari' || browser == 'Opera') {
    alert("Okay we support these browers too");
} else {
    alert("We hope that this page looks ok!");
}